تأثير الرش بتركيزات مختلفة من المستخلص المائي لفصوص الثوم في صفات النمو الزهري و المحصول لنبات الخيار (.Cucumis sativus L)‎ صنف (Beit Alpha)‎ تحت الظروف المناخية لمدينة إب في اليمن

الملخص EN

Cucumber is one of widespread crops cultivated locally in greenhouses due to its nutritional value.

However, having higher number of female flowers compared to male flowers in the cucumber plant affects negatively the crop production.

Thus, this research aims at studying the effect of spraying different concentrations of watery garlic extract on the flowering characteristics and the total yield of the cucumber plant var Beta Alpha.

To achieve this, different concentrations of watery garlic extract @1.25, 2.50, 3.75, 5, 6.25 and 7.50 cm3/L were added to distilled water (which was used as a control treatment).

This research was conducted in 2019 at the nursery of the Bureau of Agriculture and Irrigation, Ibb Governorate, Yemen.

Results showed that spraying the watery garlic (Allium sativum L) extract improved the characteristics of flowering growth and the total yield.

The concentration of 3.75cm3/L gave the highest values and significant superiority to the studied aspects.

This concentration made the number of female flowers/plant, sex ratio and total productivity reached 3.81 nodes, 40.1, 1.29 and 31.44 hectare/ton respectively.

However, it gave lowest values for the location of the first female flower and number of male flowers/plants, with a significant decrease of 4.98, 30.82 flowers respectively.

On the other hand, the concentration of 5cm3/liter gave the highest values for the knotting of fruits percentage, with 58.11% significant superiority.

The quadratic regression (R2) value improved from 3.6% (linear) to 86.6% (quadratic).

It is noted that the quadratic model showed higher efficiency than the linear model in explaining the decrease or increase of production associated with decrease or increase of garlic extract concentrations.

In the quadratic curve, if garlic extract is foliar sprayed at a level of 3.53 cm3/L, the maximum cucumber total yield is expected to be 30.94 t ha-1.

This research proved the efficiency of watery garlic extract at specific concentrations on raising the number of female flowers against male flowers leading to plant production increase.